That makes sense given the Charter service stems from the same Verizon Mobile Virtual Network Operator (MVNO) agreement that is the basis for Comcast’s Xfinity Mobile service, which was launched last year.

The 4G LTE Spectrum Mobile service is connected to the cable operator’s WiFi hotspots across the country, according to Charter.

Customers can pay for data in two ways – a flat $45 per month, per line fee for unlimited data; or they can pay by usage. The "By the Gig" plan is the only area Spectrum Mobile differs from the XFinity Mobile product – Charter charges $14/GB per month on that plan, while Comcast charges $12/GB. Both Spectrum Mobile plans include free nationwide talk and text.

Like XFinity Mobile, customers can switch data plans during the month, so they only pay for the data they need. Charter claims Spectrum Mobile customers can save as much as 40% over competing wireless services.

Spectrum Mobile also offers mobile devices via interest-free installment plans. Devices from Samsung and LG are available today, with other devices available soon. For more information, visit Spectrum Mobile here.